vb.net上传文件到FTP服务器

上传文件到ftp服务器整理：

　　声明：以下代码为vb.net代码，使用Visual Studio 2008开发，所有代码均通过测试，可以直接使用。欢迎转载，请注明出处，欢迎拍砖。

web.config 文件配置， 将用户名，密码和ftp服务器的地址存放到web.config文件：

    <appSettings>
    <add key="UserName" value="superuser"/>
        <add key="PassWord" value="Super2011"/>
        <add key="CompleteFTPPath" value="ftp://10.158.168.167/"/>
    </appSettings>

文件上传步骤：

　　1.读取文件到一个FileStream

　　2.设置ftp服务器访问信息，主要是ftp服务器地址，访问ftp服务器的用户名和密码，访问类型，等待时间等待。

　　3.在ftp服务器中创建一个空的文件

　　3.将源文件读取到byte()数组中

　　4.将byte()数组中存放的数据写入到另外一个Stream, 这个stream是我们刚在ftp服务器上创建的空文件

　　5.完成写入

以下是文件上传代码：

'''<summary>
''' upload txt file to specified destination.
'''</summary>
'''<remarks></remarks>
    Private Sub uploadFileByFTP()
'is uploaded
        Dim isUploaded As Boolean = False
'File path
        Dim fi As New FileInfo(Server.MapPath(".").ToString & "\TestFileFolder\" & strFileName)
'Create a file in the ftp file server
        Dim reqObj As System.Net.FtpWebRequest
        reqObj = DirectCast(System.Net.WebRequest.Create(ConfigurationManager.AppSettings("CompleteFTPPath") & fi.Name), System.Net.FtpWebRequest)
'Configure the request methods as uploadfile
        With reqObj
            .Credentials = New Net.NetworkCredential(ConfigurationManager.AppSettings("UserName"), ConfigurationManager.AppSettings("PassWord"))
            .Method = WebRequestMethods.Ftp.UploadFile
            .UseBinary = True
            .ContentLength = fi.Length
            .Timeout = 10 * 1000
End With
Try
Using fsSource As FileStream = New FileStream(Server.MapPath(".").ToString & "\NameplateFile\" & strFileName, FileMode.Open, FileAccess.Read)
' Read the source file into a byte array.
                Dim bytes() As Byte = New Byte((fsSource.Length) - 1) {}
' Get the length of the source file
                Dim numBytesToRead As Integer = CType(fsSource.Length, Integer)
Dim numBytesRead As Integer = 0

While (numBytesToRead > 0)
' Read may return anything from 0 to numBytesToRead.
                    Dim n As Integer = fsSource.Read(bytes, numBytesRead, _
                        numBytesToRead)
' Break when the end of the file is reached.
                    If (n = 0) Then
Exit While
End If
                    numBytesRead = (numBytesRead + n)
                    numBytesToRead = (numBytesToRead - n)
End While
                numBytesToRead = bytes.Length
' Write the byte array to the ftp file server
                Using fsNew As System.IO.Stream = reqObj.GetRequestStream()
                    fsNew.Write(bytes, 0, numBytesToRead)
                    isUploaded = True
End Using
End Using
　　　　　　' upload successfully 
　　　　　　 File.Delete(Server.MapPath(".").ToString & "\TestFileFolder\" & strFileName)
If isUploaded = True Then
                lblMsg.Text = "File uploaded successfully!"
Else
                lblMsg.Text = ""
End If
Catch ex As Exception
Throw ex
End Try
End Sub

以上是一个简单的上传文件的代码，仅供参考。

相关链接：

create a new FTP site  http://learn.iis.net/page.aspx/301/creating-a-new-ftp-site/

转载于:https://www.cnblogs.com/Dannier/archive/2011/09/21/ftp.html